Yes, it's likely that the next camera is launched T6i. I just hope it has the same sensor 70D.
Canon is shrewd when it comes to milking profits from sensors. Consider that the T5i/700D did not get the latest version of the 18 MP APS-C sensor. The T5i's sensor has Hybrid CMOS AF (same sensor as the T4i and the EOS M), whereas the sensor used in the SL1/100D and the EOS M2 has Hybrid CMOS II AF (where the phase AF area covers 80% of the frame vs. just the central portion). That allows Canon to release another T#i-series body with a 'new' (to the line) sensor (but not the 70D's sensor). Put Digic 6 in there, and they're good to go with the T6i/750D.
You are absolutely right. Canon will not let you get the 70D sensor in a Rebel price camera. The earliest that the 70D sensor migration to Rebel will be T7i. Or if you look at the T4i to T5i change, it will be in T8i. So in 2016.