Hmmm... ive been giving it a thought and it may sound kinda absurd but if BRAWl is going to have online patches (to add characters , fix glitches ,balancing etc. ) i see no reason for them not being able to add the the characters, moves , techs of SSBM (or the could possibly save the entire game into a section of BRAWL, possibly even SSB to have the support of hardcore Fanboys)
the only thing is that this may require the use of some extra hardware to save it ( although most people here can agree with me that it would totally worth the extra amount of cash
)
this would also require the creators of Brawl to work with the people on the boards in order to decide what needs to be Nurfed , buffed or deleted
And by working with closely with the consumers the company will gain many more sales because they will gain our loyalty
its a WIN WIN
So the answer to the question is that i can see the melle scene still being around jsut with more characters and moves
..... that Just my 2 Cents