A few questions/comments on CO's possible plans: (My opinions)
Continental Express with a "hub" in SJU- wouldn't that compete with AA Eagle, who already is well established there & kill airlines like Cape Air? Would they send props or ERJs? (Does CO still have props? I'm not sure.)
I can see CO putting a mini-hub in SJU- it seems like there's plenty of gate space in that concourse, there was/is a CO lounge ("President's Club", is it?) there, but as Prinair said, they'd need to base a ton of stuff there to hold a candle to AA.
What about Gulfstream? Does CO still have the codeshare with them using Beech 1900s inter-island that they did a few years ago & this would run under the CO Express branding?
A310/319/320/321/333, ARJ, BN2, B722/73S/733/734/735/73G/738/739/744/757/753/767/763/764/777, CR1/2/7/9, DH6, 328, EM2/ERJ/E70/E75/E90, F28/100, J31, L10/12/15, DC9/D93/D94/D95/M80/M88/M90/D10, SF3, SST