You're presenting the situation as something it is not. I believe, by the NMB's own rules, negotiations stop until any representational question before them is settled.
How bout this timeline:
AMP drives moves forward - no real negotiations pending drive success or failure
Spring 2011 - Drive Success! - Vote set for June 2011
AMP passes and is now new union July 2011
AMP organizes builds cash and gets pro negotiaors to table - Nov 2011
AMR sees AMP going hardline and starts 18 month clock to outsource (see NWA)
AMP demands retstore and more - AMR counters - back and forth for 2012
2013 - AMR is now 3 months away from outsource plan and goes hard line - now wanting an impasse too
July 2013 - Impasse - PEB steps in and forces settlement that looks alot like current TA
OR - AMP strikes or AMR locksout and you look a lot like NWA....
OR
Base maint gets sold and carved up and everyone can reapply for their old jobs with the new company
OR -
Airlines return to massive profitablity in 2011 and AMR caves and gives you all you want in 2012
OR
TWU gets tossed - AMP doesn't get in and their is no union and you start to look like Delta.....(not a bad thing - at lease you save union dues and have one less outfilt to complain about)
Would be interesting to hear how others see this playing out...