If we look at the present scenario we can see the most demanding camera by the photographers is Canon 6D Mark II, which is highly expected to be announced sometime in July, 2017. But Canon SL2, on the other hand, is also the anticipated camera that rumored to be announced in September. In March of this year, the code name of SL2 was leaked online along with a few other cameras but that time we only knew that SL2 would be announced sometime in 2017 rather than knowing the exact schedule.
Talking about its physical dimension, then rebel SL2 will be comparatively smaller and lighter than rebel SL1, but is going to be very powerful that might be awarded the king of small DSLRs in the world.
According to the rumor mill, Canon SL2 may assemble very identical features from the new, Canon 77D.