I would not be surprised to see them at the Nuremberg Toy Fair in early February. Remember how AE picked up the Centro buggy conversions kits, maybe to clear B4 stocks before the B5(M) series? People around the world start to notice how much better racing trucks are to drive vs. 2WD SC. They are the perfect compromise between SCTs and buggies, easier to drive but still agile.
Pro-Line's recent release of the RT6/Centro Bulldog body might also be a sign; it may very well be the T5M's kit body.
I agree with this line of thinking. If you look at a timeline of how and when they have released products in the past it seems plausible that we could see a T5 Team kit, B5/B5M Factory Team kits, and/or an updated SC platform (don't know what they would call that one) in the first part of 2015.