That website was source to the Avengers #27 panel for the new header, FYI. A couple of nostalgic pages by George Pérez to click to enjoy are there. It coincidentally is also source to Avengers's George Pérez Tribute header https://www.comicboards.com/php/show.php?msg=avengers-2022050822291089 that is being replaced. These Busiek/Perez related sites also features that same issue #12(1998) OLD ENTANGLEMENTS awesomely rendered splash page:
http://notahoaxnotadream.blogspot.com/2015/04/avengers-by-kurt-busiek-george-perez.html.
https://talesfromthekryptonian.blogspot.com/2017/09/marvel-master-monday-with-kurt-busiek.html

https://marvel.fandom.com/wiki/Avengers_Vol_3_12 [1999]
https://marvel.fandom.com/wiki/Avengers_Vol_3_27 [2000]