While trying out this version of wildfly-swarm, I encountered an execution time error:
org.jboss.modules.xml.XmlPullParserException: Failed to resolve artifact 'org.jboss.msc:jboss-msc:1.2.6.Final'
A google search for this error reveals that issue 88 was reported against the Alpha4 version which was closed.
This problem seems to have resurfaced in Alpha5.
I have a valid localRepository setting in both my maven settings.xml file.