The last movie they made was good, but a bit underwhelming as a movie.
I think a prequel would be the way to go.
The story of Spike leaving the syndicate is prime for a movie though. Theres the backstory of Spike and Vicious as friends working together, the life of crime, the love triangle with Julia, a lot of action, drama and best of all, the break and Spike and Vicious and the start of their rivalry.