Firstly, this idea may have been floated before so forgive me if I'm covering old ground.
I've been thinking about the new rectangular stadium being built that will ultimately become Melbourne's new training base and headquarters.
The idea of the new stadium is to provide something specifically for Rugby and Soccer, but was it ever considered to make the stadium/ground big enough to play Aussie Rules as well? For example, a stadium with a retractable seating system that allowed it transfer from an AFL ground to one suited for Rugby/Soccer.
The MCG is a fantastic venue, but is it too big for a club like Melbourne? Instead of being shared by competing AFL teams, Melbourne could share the venue with the Storm and Victory, giving some value to Team Melbourne (which currently doesn't include the Victory).
In reality, it will be a rectangular ground and I wouldn't know if making it big enough for Aussie Rules is feasible or practical, but I am interested to see what people think of moving away from the MCG (still within Melbourne) to a ground with a smaller capacity?