-This has been done, reket1990
****UPDATE****
It is not 100% guaranteed yet, but it looks like the separated preorder packs for characters are causing this bug!
-So in case you own ALL 4 preorder-characters you should be fine with using their moves on your combot.
However you should in any case create a backup before trying out! And please let us know about the results.
-If you are owner of a preorder pack A or B (including only 2 characters per pack: Michelle/ Angel, Ogre/ Kuni) you definately don't want to equip combot with DLC-moves, chances are very high or even guaranteed it will render your savegame useless! Best bet is to completely stay away from combot-tuning until a patch or all preorder-characters have been released.
Thanks to PianoMatn there is also a YT-video now demonstrating the bug:
http://www.youtube.com/watch?v=ha2JOwmsPCY&feature=plcp
**************
original message:
Here's the warning:
When you equip combot with a move of your DLC-characters, it will break your savegame and make it unloadable!
Plain and simple.
So do it only in case you want to begin all over again or feel like stop playing Tekken until a patch will fix this.
PS: Affects PS3 and 360-versions!
full story/ other threads:
viewtopic.php?f=13&t=371
or
viewtopic.php?f=14&t=1520