Taito trademarks suggest more Lost Magic, Virtual Console shmups

A set of recently-filed Japanese trademarks found by Siliconera reveal potential plans for new games by Taito. Most notably, the company
trademarked the name
Lost Magic: Shouryu no Kyousoukyoku, which Siliconera translated as
Concerto for the Fallen. The original DS game was just
Lost Magic, and the recent Wii sequel/spinoff was called
Takt of Magic, so this is likely to be intended for a new game.
In addition, the company
re-registered titles
Darius Twin and
Metal Black, which lead Siliconera to predict Virtual Console releases for the two arcade shooters. The company also registered
Samurai Ninja, which is a bit of a
mystery. Taito had a game called
Samurai Nihon-Ichi, and a game called
The Ninja Warriors, but nothing that we could find called
Samurai Ninja. How could you be both a samurai
and a ninja? The two occupations seem at odds.