I already have this game on my to-do list, but this repro stuff isn't exactly what I wanted to hear. In fact, knowing there's potentially a repro market for it makes me not want to do it at all.
There are several reasons for my opposition:
1) Selling repros of copyrighted material is illegal and attracts heat from the rightsholder. The ROM hacking community doesn't need any heat.
2) Most repro makers are scumbags making a profit off of other people's work, and I don't want to help them.
3) Even when the repro maker offers to compensate the ROM hacker, I don't really want to be associated with the repro community for reason #2, and there's still problem #1 above. Making money off a hack greatly increases the chance of my receiving a cease and desist order.
4) If you want to play a game on the real system, a PowerPak, Super Everdrive, or SD2SNES will take care of that handily. (Some games may not run on these, but WC98 shouldn't be one of them)