diff --git a/awx/api/serializers.py b/awx/api/serializers.py
index 122d330cb3..f9d21b0c7d 100644
--- a/awx/api/serializers.py
+++ b/awx/api/serializers.py
@@ -4418,6 +4418,7 @@ class JobLaunchSerializer(BaseSerializer):
 class WorkflowJobLaunchSerializer(BaseSerializer):
 
     can_start_without_user_input = serializers.BooleanField(read_only=True)
+    defaults = serializers.SerializerMethodField()
     variables_needed_to_start = serializers.ReadOnlyField()
     survey_enabled = serializers.SerializerMethodField()
     extra_vars = VerbatimField(required=False, write_only=True)
@@ -4429,16 +4430,27 @@ class WorkflowJobLaunchSerializer(BaseSerializer):
 
     class Meta:
         model = WorkflowJobTemplate
-        fields = ('can_start_without_user_input', 'extra_vars', 'inventory',
-                  'survey_enabled', 'variables_needed_to_start',
+        fields = ('ask_inventory_on_launch', 'can_start_without_user_input', 'defaults', 'extra_vars',
+                  'inventory', 'survey_enabled', 'variables_needed_to_start',
                   'node_templates_missing', 'node_prompts_rejected',
-                  'workflow_job_template_data')
+                  'workflow_job_template_data', 'survey_enabled')
+        read_only_fields = ('ask_inventory_on_launch',)
 
     def get_survey_enabled(self, obj):
         if obj:
             return obj.survey_enabled and 'spec' in obj.survey_spec
         return False
 
+    def get_defaults(self, obj):
+        defaults ={
+            'inventory': {
+                'name': getattrd(obj, 'inventory.name', None),
+                'id': getattrd(obj, 'inventory.pk', None)
+            }
+        }
+
+        return defaults
+
     def get_workflow_job_template_data(self, obj):
         return dict(name=obj.name, id=obj.id, description=obj.description)
 
diff --git a/awx/ui/client/lib/components/launchTemplateButton/launchTemplateButton.component.js b/awx/ui/client/lib/components/launchTemplateButton/launchTemplateButton.component.js
index d31ea36f33..4574ef6fc5 100644
--- a/awx/ui/client/lib/components/launchTemplateButton/launchTemplateButton.component.js
+++ b/awx/ui/client/lib/components/launchTemplateButton/launchTemplateButton.component.js
@@ -93,9 +93,8 @@ function atLaunchTemplateCtrl (
                                 $state.go('workflowResults', { id: data.workflow_job }, { reload: true });
                             });
                     } else {
-                        launchData.data.defaults = {
-                            extra_vars: wfjtData.data.extra_vars
-                        };
+                        launchData.data.defaults.extra_vars = wfjtData.data.extra_vars;
+
                         const promptData = {
                             launchConf: selectedWorkflowJobTemplate.getLaunchConf(),
                             launchOptions: launchOptions.data,
diff --git a/awx/ui/client/lib/models/WorkflowJobTemplate.js b/awx/ui/client/lib/models/WorkflowJobTemplate.js
index 5ce646de6e..ae649c03fb 100644
--- a/awx/ui/client/lib/models/WorkflowJobTemplate.js
+++ b/awx/ui/client/lib/models/WorkflowJobTemplate.js
@@ -1,7 +1,6 @@
 /* eslint camelcase: 0 */
 let Base;
 let $http;
-let $q;
 
 function optionsLaunch (id) {
     const req = {
@@ -13,19 +12,16 @@ function optionsLaunch (id) {
 }
 
 function getLaunch (id) {
-    const urls = [
-        `${this.path}${id}/`,
-        `${this.path}${id}/launch/`,
-    ];
+    const req = {
+        method: 'GET',
+        url: `${this.path}${id}/launch/`
+    };
 
-    const promises = urls.map(url => $http({ method: 'GET', url }));
+    return $http(req)
+        .then(res => {
+            this.model.launch.GET = res.data;
 
-    return $q.all(promises)
-        .then(([res, launchRes]) => {
-            this.model.GET = res.data;
-            this.model.launch.GET = launchRes.data;
-
-            return launchRes;
+            return res;
         });
 }
 
@@ -52,28 +48,7 @@ function getSurveyQuestions (id) {
 }
 
 function getLaunchConf () {
-    // We may need api updates to align /:id/launch data with what is returned for job templates.
-    // For now, we splice values from the different endpoints to get the launchData we need.
-    const {
-        ask_inventory_on_launch,
-        ask_variables_on_launch,
-        survey_enabled,
-    } = this.model.GET;
-
-    const {
-        can_start_without_user_input,
-        variables_needed_to_start,
-    } = this.model.launch.GET;
-
-    const launchConf = {
-        ask_inventory_on_launch,
-        ask_variables_on_launch,
-        can_start_without_user_input,
-        survey_enabled,
-        variables_needed_to_start,
-    };
-
-    return launchConf;
+    return this.model.launch.GET;
 }
 
 function canLaunchWithoutPrompt () {
@@ -104,10 +79,9 @@ function WorkflowJobTemplateModel (method, resource, config) {
     return this.create(method, resource, config);
 }
 
-function WorkflowJobTemplateModelLoader (BaseModel, _$http_, _$q_) {
+function WorkflowJobTemplateModelLoader (BaseModel, _$http_) {
     Base = BaseModel;
     $http = _$http_;
-    $q = _$q_;
 
     return WorkflowJobTemplateModel;
 }
@@ -115,7 +89,6 @@ function WorkflowJobTemplateModelLoader (BaseModel, _$http_, _$q_) {
 WorkflowJobTemplateModelLoader.$inject = [
     'BaseModel',
     '$http',
-    '$q',
 ];
 
 export default WorkflowJobTemplateModelLoader;