For me Titan Returns looks like it will be more interesting than Combiner Wars, even though so far I've only seen two that I really want. Removing the combining gimmick from the CW toys, I found them to be very samey and not all that much fun to transform and play with, they almost all transform the same way.

Titan Returns brings back the possibility of deluxe toys that are fun independent of the rest of the line, but can still through the headmaster gimmick interact with the rest of the line if you want to. For combiner wars you need a set of 5 to get any use out of the gimmick.

Having said that I'm still not as keen as the Generations announcements of yesteryear, as most of these guys still look pretty cut down and I miss wrist articulation which is effectively dead now.