......."Rival Blaze"?
Instead of competing with him, why not work with him? If you can get Tails DX sprites (And I use the term "Sprites" lightly.) and Kunckles DX sprites, then join it with SASRB2, then you can make a great game with less effort. SRB2: DX? So are those sprites the only thing in SRB2: DX? If so, then I'm gonna have to agree with Cy-Chan. If you don't want to join your DX sprites with SASRB2, then you should just stop with SRB2: DX and just make wads of them. Unless you wanna go through coding stuff into SRB2 like stupid camera angles and deaths every few minutes. Sure you could make new levels into SRB2: DX but that's just ripping off SASRB2. Blaze kinda got there first so if you're looking into competing with SASRB2, then you're gonna have to find something more than new levels and sprites.
Sorry to be so harsh but I think these sprites have something ahead of them. They could rock the world if you use them right. I'm not sure if using them with SASRB2 is right, but I'm just handing out suggestions and all. Please forgive me if this post angers you but I'm just making a few suggestions here and there. =\