SourceBans 2.0 now uses Twig instead of Smarty, so the themes are not compatible, but the syntax is not that difficult to learn. Also development is currently on hold because we don't have a designer to make a theme, and the paid themes offered on ThemeForest etc. cannot be used in open source work, unless you pay a lot more. So yes, if you're willing to make a theme for 2.0 you have my blessing
