Gateways, which also featured each series' title.
That said, I think in a lot of ways it's better when they leave it off. The whole "Star Trek: The Next Generation # (whatever): Invasion #2: The Soliders Of Fear" chains of titles thing is a bit cumbersome. With Typhon Pact, for instance, it was fairly trivial to tell looking at the covers which series got focus in each entry. As long as they keep doing that, and don't just throw ambiguous space scenes or something on the cover, I say keep the text simple.
I realize this is an extremely minor detail either way.