"Sequel" is a strong word. There's not going to be any story connection to the previous film(s, supposedly it will stand entirely on its own), the writers are different, and so is the director. Its more like Jackman and Shuler Donner are calling a mulligan on the previous movie.
I too am cautiously optimistic. One half of the writing team is responsible for such films as The Usual Suspects, X-Men, and Mission: Impossible – Ghost Protocol. The other half wrote Constantine, Live Free or Die Hard, Race To Witch Mountain, Unstoppable, and Total Recall (2012). Mixed bag there. The director has made such films as Cop Land, Walk The Line, 3:10 to Yuma, and Girl, Interrupted. Oh, he also did Knight & Day (which was actually pretty fun) and Kate & Leopold (THERE'S A GREAT BLINKING TIME PARADOX IN THE ENDING THAT DOESN'T NEED TO EXIST! WHY?!). So the conclusion is...I have no idea, the combined experience runs a gamut of quality and crap.