Lockins - standard is 24 months if you bid the job. If you displaced to a new job the lock in is zero.

If you bid 'new equipment in a base' (eg 330 MIA? 777 PHL?, 737 PHX/CLT??) you incur a 12 month base lockin even if you don't trigger training.

'New equipment in a base' allows you to break any existing lockin IF your current lockin existed before the 'new equipment' was announced.

Eg, bid 767 in May 2016. Company announces 737 CLT for FEB 2017 this month. You can break the 767 lockin but you'll incur a 24 month equipment lockin and a 12 month base lockin. I'm not sure if you could then MBE out of CLT. In Jan 2017 the company announces 330 MIA for May. You can break the 737 lockin under the 'new equipment in a base' and transfer to the 330 in MIA.
And in Sept 2017 they announce 777 in PHL. Off you go again. And in Dec 2017 they announce 787 in JFK. You can bid that also.

So I think it's likely they'll announce 'new equipment in base' all at once vs piecemeal. Piecemeal might trigger more training as guys break existing lockins. If they make one large announcement you'd have to choose one option for the next two years.

And somewhere in there they'll have to announce the 350 basing.

So there might be significant amount of lockins being broken as additional 'new equipment in a base' options become available.