Here's the teaser, for those who didn't see it:
http://www.newsarama.com/comics/marvel-teaser-thunerstrike-100809.html
I have to admit, until I did a Google search I hadn't seen it, either. At most, if Kevin Masterson aged as much as characters typically do in "Marvel time", then he could be about four years older than he was in the late 90's. Which, unless he was very young would make him a teenager, 13 at least if not older. Cassie Lang was stated to be about 14-15 back when YA started, and the Marvel universe aged a year when they claimed Cap was dead that long. Come to think of it, I am wondering that when Jonathan Hickman brings back Kristoff Vernard, as he seems to plan to from some FF teasers, he remembers that Kristoff and Cassie were supposed to be around the same age. Or he'll forget and Kristoff will suddenly be 21 or something.
Getting an old, non-well known or popular creative team (if DeFalco/Frenz were hot, SPIDER-GIRL would have at least been able to sell in the Top 100 more often that it did) on board to relaunch a franchise that has been out of print since Bill Clinton's second term in office was fresh is the RECIPE for a comic book that will sell very poorly. THOR may be able to support the occasional spin-off mini or one-shot, albeit those don't exactly sell in the Top 50 on average anymore. For all intents and purposes, Kevin would be introduced to most readers and many retailers as a new character aboard a new, or so old it's new again franchise. YOUNG ALLIES should be a lesson as to how those tend to sell; the debut barely broke the Top 100.
In theory, getting a "young Thor" out there (apparently because Tarene/Thor Girl has been mostly forgotten after AVENGERS: THE INITIATIVE ended) to do a Thor spin off isn't a bad idea, and why not get the creators who worked on the MC2 version of him to work their magic on the 616 version. The problem is there has to be a connection between theory and reality, and sometimes I don't know if Marvel gets that. It's nice that they're taking a risk on something new-ish, but I'd be more impressed if it was something that won't sell so poorly that even as a 6 issue mini, it would be seen as a hiccup on the schedule. Fans trade wait on titles they expect to tank and become trades 5 minutes after they're canceled after the first arc, which aggravates the problem.
None of this means it won't be good or entertaining, but being both doesn't ensure a book succeeds, sadly. It has to be hyped and accepted as "important" by Marvel, retailers, and fans, and have things like a hot franchise, a hot creative team, and so on. And even despite all that, it may STILL tank, like Bendis/Maleev on SPIDER-WOMAN (twice).
The ideal way to bring in Kevin as the new Thunderstrike would be to promote it as an Avengers/Young Avengers event and attach him to that franchise, but oh, wait, the YA are stuck in a carbonite series with Heinberg & Cheung that's so late that Steve Rogers still has a cape and an N on his belt.
For the record for the curious, as I was, while ICV2 hasn't released hard numbers about July 2010's sales numbers, Diamond released their Top 100 for that period and AVENGERS: THE CHILDREN'S CRUSADE #1 sold at #34 of the Top 35. We don't know if July was an up or down month for the Top 300 from June in terms of overall sales, but regardless that is a very good placement considering some of the last YOUNG AVENGERS material could barely crack the Top 50-60 at debut. In June 2010, comics that sold at that placement tended to move between 44k-45k copies. That's below where YOUNG AVENGERS #12 sold way back, but that's above where DARK REIGN: YOUNG AVENGERS finished. It's possible that there really was anticipation for the original creators to return, or that retailers were fooled that it was another Avengers series instead of YA under a new name. Or both. At any rate, that franchise is ultimately Kevin Masterson's natural place, if he is indeed the next Thunderstrike.