starting in the 90s, the big trend for US baseball stadiums was to go retro - brick and steel and ivy vines. everything right now is a glass, concrete and steel bowl - i wonder if someone will go retro and build 4 stands but with state of the art design.
i guess from a financial standpoint, it doesnt make sense to leave the corners empty. but even stylistically, it would be nice to get away from glass and concrete.