The final issue was no better.
There is no Hulk/Thanos fight. There isn't even a Thanos/Hulk team-up, or interaction of any kind. In fact, Thanos only appears in one single panel in the entire issue. The whole issue revolves around the new Annihilus beating the crap out of Hulk.
Even by comics standards, this was some ridiculously misleading advertising.
Cheers.