oops my mistake. i didn't realize you said you wanted to go online.
as far as every prior wii game, updates from online are just that. there is no risk of bricking as it only adds a save file. harmless, even if for a different region. so yeah go ahead its fine, as long as you are not updating the system there is no risk. and if you are playing the game, then everything should be fine.
it may need the shop channel and corresponding ios updated. i know black ops had me do that.