Predictions in order of likelihood:
1) B&M Invert - meets the air/bird theme, majorly improves upon the terrible SLC, could see something similar to Banshee.
2) B&M Flyer - air/bird theme, improves upon Spine Warp, see something similar to Tatsu/Flying Dinosaur.
3) B&M Wing - air/bird theme, first Wing coaster in Canada, BUT this tunnel would have to be huge to accommodate the width of the ride/trains.
4) B&M Floorless - meets the "we need a good looping coaster" criteria, first Floorless coaster in Canada.