original report, Capcom's Christian Svensson has stepped up and confirmed the existence of Mega Man Dual Pack. The product is indeed a budget bundling of Mega Man Powered Up and Maverick Hunter X in a single package, due for release on September 5 for $14.99 US.
I've also scored some additional product details from GameStop associate John: Contrary to early speculations, Dual Pack will not offer additional content for either MMPU or MHX. What's more, I've been informed the games will remain as individual entities. In other words, Powered Up and Maverick Hunter will be on two separate UMDs as opposed to a single disc. Finally, unlike the Japanese Rockman Rockman/Irregular Hunter X Value Pack (pictured) from a couple years back, Dual Pack will not ship alongside a bonus soundtrack.
Dual Pack is essentially a repacking of two great titles; there's nothing fancy to it. The product is intended for PSP owners who've yet to play the games. There's absolutely nothing wrong with that objective, but if you were expecting more, I'm sorry to say this is not that product. In any case, Dual Pack gives the two games another chance to shine at market. Numbers talk, of course. If it sells well enough, perhaps Capcom will finally get around to cooking up those sequels...
Thanks for the info Sven and John!