What is it with people on the Sm4sh forums swinging their opinions around like they are somehow more important or factual than other people's... PM is not illegal in just about any real way, though a case could probably be made over Brawl's Eula, however there's so much legal gray area within those terms that it really shouldn't even be acknowledged, plus Nintendo isn't nearly as asinine as other companies when it comes to such things. Did you know Itunes has a contingency for a nuclear holocaust in your Eula? Anyway PM is great, IGN attention, that **** is legal, etc.
Also negative connotations being thrown on mods is kind of a pop-culture phenomenon stemming, in my opinion, from lack of knowledge in gaming history and culture, not to mention how it is being made to seem almost tabuu by dev's(heck it is even starting to be lumped together with piracy). Kids these days, I swear. Modding games is how most aspiring game designers, programmers, artists, and developers get their start in the business. Many games still openly encourage modding and actually take ideas from popular mods, see Tes V Skyrim and all elder scrolls games. Mods don't hurt a game or it's community, usually quite the opposite actually, in fact many are created by exceptionally competent and passionate hobbyists or retired/off the clock game dev's. Brawl being the most hacked and modded console game and fighter to date with probably 10 different projects adjusting it's gameplay and balance, not only speaks to the relative accessibility to modding it, but the general dissatisfaction of fans with the game. Also Dantarion the great has probably already finished the clone engine and I honestly wouldn't be surprised to find out that PM may have actually begun working on mega man before smash 4 was even announced. Just saying it wouldn't surprise me given how much they have already achieved and how in touch they are with the community.
On an unrelated note blindly throwing out silly broad statements and speaking for entire communities while attacking something, or someone with abusive and derogatory comments doesn't make you look correct, or intelligent, just uninformed and foolish. I also hate my phone's auto-correct.