The last comic I read was the three-part miniseries Babylon 5: In Valen's Name by DC Comics.
Basically, the miniseries has two interlocking stories: the first is about the crew of the Babylon 5 station finding the decaying remnants of the Babylon 4 station and encountering a hostile alien species with apparent ties to B4, the second is about what happened to Jeffrey Sinclair after he travelled back into the past and became Valen.
Basically, I liked it; the story was good and so was the art. The only bad thing I have to say about it is that it left me with a desire to read more Babylon 5 comics, a desire I can't satisfy as there virtually aren't any other B5 comics beyond DC's main series, and the artwork in those comics is so cringe-inducingly awful that I couldn't get through the first storyline.