Pre-Alpha Flight look at Guardian

Courtesy of the "John Byrne Draws" tumblr account.

It's probably fairly obvious, but the second character from left was referred to as an early version of Guardian (quite early, since the sketch is said to be from roughly 1971) when I first came across this piece.  Viewing the page now, I see an asterisk next to "Guardian" but with no explanation as to what it signifies so I suppose there's a possibility that it is not the case, or at least not confirmed.

If you're a John Byrne fan, you need to follow that account, or the similar Twitter account "John Byrne says".  They display tons of rare art and quotes from the controversial writer/artist.