To the best of my knowledge that's not possible with the WildFly plugin alone. I would suggest another approach, that is coding a partial deployment script using with Ant and invoke the AntRun script from Maven:
Place any Ant task here. You can add anything
you can add between <target> and </target> in a
Actually Maven and Ant are not exclusive so that could work. I'd be glad to hear anyway if anybody has got other solutions to the question.
Thanks Francesco, it looks feasible!