There are two types of licensed prop replicas:
Type 1) A faithful copy of the original prop that was handled on set, made from the same materials and similar - if not exact - paint and construction techniques.
Type 2) A sterilized copy that has design, material and construction improvements and/or changes from what was originally used on-set.
I think eFX is doing all the right things here - making sure their prop replicas fall under the 'Type 1' description while also gearing up these releases well before the movie even hits.
It's all about striking the iron while its hot and in this hobby, money comes and goes for many of us so quickly it's sometimes a necessity to pass by some items because your money is just tied up in other purchases.
By teasing the release of these fine products in advance and given the quality and accuracy of eFX products, collectors can rest easy knowing that after we are (hopefully) blown away when we see The Avengers, we have a lineup of superior quality, faithful replicas coming our way.
Kudos to you eFX!! Rep points awarded...