Wouldn't get to excited going in as a fo.
It is openly being discussed how to get the most out of all here.
That being
VB is struggling to crew flights and get experienced people to take commands on EMB etc. Looking more and more like they may incorporate all. I.E to get a command on the 777 you must have 2000 or 3000 hours jet command and therefore that opportunity will be given on EMBs etc while the experienced 737 guys move to left seat 777.