I'd rather RVD be the heel. He was an arrogant asshole back in ECW anyway (and let's be honest, he's arrogant in real life, too) and I think him playing his arrogance to the extreme would fit in with him being a part timer.. The whole "I can come and go as I please" sort of attitude. Plus, their last feud ten years ago had Kane as the heel, so it's better switching it around this time.
Of course, I'd rather not see this feud either but it's just an undercard feud, so I wouldn't mind it much either.