Sure, it seemed like Hulk would be a perfect fit on the right wing for Chelsea. He would join the team with Eden Hazard, and the two would change how football is played at Stamford Bridge.
However, his transfer saga has dragged on, and it doesn't look like he's coming anytime soon. On June 1, Chelsea were "closing in" on a deal with Hulk (via ESPN). Then, on July 12, Hulk (through The Mirror) denied having any talks with Chelsea.
Hulk is a good player, but Chelsea don't need him.