Sony Computer Entertainment Europe today filed trademarks for several titles from its PS2 catalog of games, Gematsu discovered.

The list of trademarks include:

Yesterday, a video published early leaked Dark Cloud as one of the PS2 titles coming to PlayStation 4 via PS2 emulation. These trademarks are likely some of the others.

A few other titles leaked before these, however, including Dark Cloud 2, Ape Escape 2, and Twisted Metal: Black.

On a more speculative note, Capcom recently trademarked Onimusha, also a PS2 title, leading many to believe a new title is in the works. But perhaps rather it is coming to PlayStation 4 as a PS2 emulation title?