Conversation so far:
When was reformation released?
On June 21, 2005.
When was their album released?
On June 21, 2005.
What happened with their reformation?
there was question as to whether other former members of the band would participate.
Did they want to get back together?
In April 2007 Iha and Auf der Maur separately confirmed that they were not taking part in the reunion.
Why didn't they want to join the reunion?
Chamberlin would later state that Iha and Wretzky "didn't want to be a part of" the reunion.
When was the first performance?
Smashing Pumpkins performed live for the first time since 2000 on May 22, 2007.

Question: Who replaced the members that didn't want to do the reunion?
Self-contained rewrite: Who replaced the members that didn't want to do the reunion?