What an excellent week it's been for classic game fans! The DS gets a new (release of) Chrono Trigger, the Wii gets a new 8-bit Mega Man, and now this! NeoGAF's neo2046 noticed an update to Thunder Force developer Tecnosoft's website stating that a new entry in the longstanding shmup series is on the way. The WHOIS data for tecnosoft.com indicates that the domain has been in the possession of a Japanese company since 1996, and archive.org shows previous TecnoSoft webpages in that space, so this seems legit.
There's very little information on the barebones site -- in fact, you're looking at all of it -- so Wii Fanboy don't know which platform or platforms TecnoSoft is planning to release the game on. But it's a shooter, and the Wii is where shooters go this generation. TecnoSoft would be able to release classic Genesis Thunder Force games on the Virtual Console to promote it.