I'd personally picture it being announced in January '15, with possibly hints dropped before then.
Makes sense, if they announce one, they'll wait 'till the New Year, so that anyone worried about their status will MR instead.
On the other hand, I see two strikes against the program reappearing:
1) I imagine it would make their integration of the US/AA programs more complex. They'd have to dedicate (IT) resources to both the integration and implementing the boost program. And deal with any extra integration issues it might cause.
2) They raised the number of segments on EXP for next year's qualifications,, suggesting they already think there's a few too many EXP's. Putting in a Boost program would only add to their ranks.
Just as much speculation as anyone else, though.