I am super excited for this. Not as excited as I am for HIckman's event next year

, but Al Ewing has me by the cajones right now after reading his Ultimates and Immortal stuff ... so much so that I am looking into possible getting his Judge Dredd and more 2000AD stuff he did like Damnation Station and The Zauser of Zilk and the 6 issue run of Jennifer Blood he wrote which he was handpicked by Warren Ellis to do.
But, on the other hand, like you I am fearful of Dan Slott. However, I think/feel/hope that this is Ewing's baby and Slott is only there to do the writing over Ewing's plots. I don't hate Slott as a writer. I don't. I think he is actually quite good ... at times. Yes sometimes he bugs the hell out of me with his dialog and I will never understood the love for his SHe-Hulk run, but he is capable.
But hey, it has The Four in it. Of course I am going to be excited ... hopeful
