Assuming no trades are made or serious injuries, the rotation might look something like this in 2016:
Hutchison
Stroman
Norris
Sanchez
And chances are one of the two old fogies will still be producing as a solid #3-4. If there is a trade involving one or two of those four guys, it'll be for a piece that makes the Jays contend today.
There will be a ton of payroll flexibility. If Bautista is still productive, he'll probably come back on a similar annual average salary. EE's production will be the only challenge to fill at his salary, but if we take Romero off the books and apply that to EE or a player of similar production, that should be doable. Barreto's not likely to be ready by 2016, but he will be close and may be the teams #1 prospect by then, ready to take over Reyes' huge cost in 2017-18. If Lawrie doesn't run into a brick wall (literally, not figuratively) he should still be around, at increased cost. The question marks will be the OF and 2B, and that can be filled with the increased payroll flexibility.