Here is part of the email, sent on behalf of Armstrong by spokesman Mark Higgins:
Good evening
As valued friends and partners of Lance, the LAF and CSE I wanted to share a few announcements that we will make public tomorrow morning.
On Wednesday morning Lance has the privilege to announce his comeback at the Clinton Global Initiative. Lance will be joined on stage by President Clinton and Mayor Bloomberg to make the announcement. Lance will rollout the LAF's global cancer platform and their commitment to combat the disease that will claim 8 million lives this year.
Lance will also announce that he will be reunited with Johan Bruyneel and join the Astana Cycling team. His first race in the comeback will be the Tour of Australia with the season ending goal of the Tour de France. More races will be announced in the coming weeks. In addition Lance will be announcing the creation of an under 23 team sponsored by Trek that will include young cycling star Taylor Phinney.
Lance has also brought in global anti-doping expert Don Catlin to oversee his testing program.
Catlin and Phinney will be on hand at the CGI press conference. The group will travel to Las Vegas to do a press conference on Thursday morning from Interbike.