Maybe if they did a wave 80 celebration it might be good to note on or in the packaging about the best of waves and make sure they are about if new people happen along and want a Loki and a Wolverine they are easy pleased.
Maybe as a looking back at marvel history they could do some first appearance versions of characters we haven't gotten that look for before with the watcher as the builder figure.
Human Torch and Namor for a begining of marvel thing
for the other figures any of the following
Captain Britain
Meggan
She-Hulk
Black Widow
Hawkeye
Captain Marvel
Daredevil
Nebula
Star Lord
Mantis
Wonder Man
Medusa
Rogue
and probably a bunch of other cool FA looks I haven't thought of.