Tracks was the only one of those four that was supposed to be in Generations anyway, so we could still have Generations... I'm not seeing anywhere yet that officially says this 'Reveal the Shield' subline is replacing Generations as well.
To me it looks like 'RtS' is just replacing the 'HftD' sub-logo, for the remaining six months of pre-movie toys. (I am happy to be corrected on this though)