This might be sorta hard to test, but since you can roll out of king dedede's chaingrab, can the characters with fast jabs escape by jabbing DDD?
In Melee, it would work for sure (b/c jab for fox/shiek/other chars comes out on frame 3, same frame that roll becomes invincible for most chars), but what about Brawl?
I think it would depend on these factors:
-How fast does the jab come out?
-How fast can you roll after jabbing (maybe w/ jab cancelling if it's in)?
-If DDD does a shielding slide grab, does jab give enough shieldstun to safely roll away?
Obviously this will be hard to test, and nothing definite (since there isn't a wii AR yet), but a general answer/assumption would be nice.