yeah, i think you should be able to do this. but you have to consider, it should take a lot of skill on your part to pull something like this off. you shouldn't have to just punch them, then hit a button, then punch them again - too easy.
And going from what I've read, "teleport" is just fast moving. So you wont be able to point straight at them and hit teleport as you will just run into the front of them (which is fine cos you could just punch them again) but to get behind them you need to teleport around to the back of them and then line them up and WHAM!
hehe
oh im also wondering, what is the ki drain like when you use teleport? it sucked in the alpha because you would teleport to the top of a cliff and your Ki = 0 pretty much. I hope, with the huge maps in the beta the Ki drain on teleporting is not much, as it will speed the game up.