shaq never mentioned the bench.  this is 5 on 5.   
team A has some issues.  
1. defensively they are little slow.  they are playing against a small ball team.     
2. shaq/kareem twin tower - this is a scary combo on offense, but i'm just not sure if they will have a right chemistry.  can kareem play PF?  spacings could be an issue.  
3. too many alpha -  maybe it's just me, kobe is just too alpha.  how will he take 3rd banana role?  
4. baylor - yes he was great.  but he was great in 60's.  IMO, he was a prequel to charles barkley. i just don't know how he will fit in this team.  what's his role?   he won't be a scoring option.  he was never known for great defense.  i see pippen neutralizing him with his length and quickness. 
remember team B played together for a long time except rose.   they know each other.  this is MJ's team.  everything goes through MJ.  and they just upgraded a PG with d. rose.  i know rodman and grant didn't play together, but they will be fine together.  they know their role.  honestly rodman/grant will stand toe to toe against shaq/kareem in terms of rebounding. 
having said all that team A has too much offense.  they will win most likely as long as they don't try to kill each other.