From the Megaman Network:

During this weekend at the World Hobby Fair in Japan, Capcom announced the Battle Network/Star Force crossover “Rockman EXE: Operate Shooting Star” for the Nintendo DS. Scarce details are known at this point, but it’s expected to be a data action RPG that will probably be released this year in Japan. Details will be formally announced in the September issue of CoroCoro. It is likely the title that will include this year’s boss character contest winner Clock Genius. At the event, series producer Takeshi Horinouchi stated he has a variety of ideas for projects in mind leading up to Rockman’s 25th anniversary.

A new update:

The game seems to star both BN MegaMan and SF MegaMan in the BN time period, although it’s unaware if you can play as both. Right now, it appears as though SF MegaMan is the playable one. Furthermore, Harp Note appears too, making it likely that other SF cast members will show up.

There is a new Navi, ClockMan. He is an advanced Net Navi that was created in the SF time period, but of course has come back too. He may be the final design of the boss contest winning entry Clock Genius, but this apparently hasn’t been determined entirely. For now it appears he’s probably an enemy. His dialogue in the picture reads “By the way, I expect this plan to be fulfilled in 32 hours, 8 minutes and 12 seconds!!” This is likely the character indicated by the mysterious post on the RnR3 website.

A lot of the game’s graphics appear to be taken directly from the original Battle Network. Mayl’s room and the internet areas look exactly the same. However, the facial avatars appear to be new. Also, it looks like the game has a map system like BN5DS had.

The game will contain a slick opening movie.

Pics here: http://www.themmnetwork.com/2009/08/07/a-tale-of-two-megamans-operate-shooting-star-in-corocoro/

As previously reported, Rockman EXE Operate Shooting Star would contain what appears to be MegaMan Battle Network’s classic battle system. A couple of images from the latest issue of CoroCoro reveals that both MegaMans will be playable in this format. The first image shows a battle setup between both MegaMans. Star Force MegaMan will be able to use his lock-on attack, and apparently his shield as well (though this is not shown in the article pictures), but MegaMan.EXE will not, having his own exclusive abilities, so the two will have differences. Both Rockmans will be playable in the game’s storyline as well, though it’s unknown how this will work.

The second page shows that Star Force MegaMan will himself be able to use chips and Navi chips. The attack with Omega-Xis is one such Navi chip. It’s unknown if this Navi chip is somehow exclusive to Star Force MegaMan. Program Advances are shown as one of MegaMan.EXE’s moves, so it’s unknown if Star Force MegaMan will have access to them. Next, along with the minimap there is a similar PET screen to the one from Battle Network 5 DS, albeit without 3D graphics it appears.

Finally, though mostly cut off, there is mention the original Battle Network’s antagonist group, WWW (World Three), so they will likely still play a major role (perhaps with ClockMan as well?).

Pics here: http://www.themmnetwork.com/2009/09/11/corocoro-shows-oss-battle-system-w-shooting-star-rockman/