I would say it would take nothing, since DOA characters aren't going to move over to another fighting game (besides being a temporarily guest character).
Free Step Dodge
Kasumi-Phase-X
dashingcometstarchaser
Cool 
I'm just thinking of ways we can get our game back
I'm just thinking of ways we can get our game back 
KasumiLover
No thanks to that, Tekken would have to downgrade and chop off way too much for a DOA fighter xD id rather wait for TN and KT to make a new iteration than have a character appear in Tekken and then the clowning will persist xD