emb 145
Most likely the next thing you will hear is a course date for the Q400 (if you want to fly it) or the 195 (if you have the seniority). Although they are replacing the 145 they have to keep them flying in the mean time so for a short period they need extra crew whilst retraining happens.
They could of course keep you on the 145 right to the end but then they would need contract pilots for the Q400/195, and there are probably less of those in the job market.
They did this before with the 146 a few years ago, and whilst at the time it annoyed turboprop pilots who were bidding for the jet it is logical from a business sense.
You could polish your cv, or get balpa on the case assuming you are a member. This is a total guess, so maybe they are just trying to stitch you up.