Right, if you read that list thing which has the 20 different legions on it, you'll notice the II and the XI are the ones scribbled out. (see dark angels codex page 73).

While I was reading the second heresy novel, False Gods, I noticed this:

Quote Originally Posted by False Gods, pg284
He [horus] stopped by the tank with XI stencilled upon it and placed his hand against the smooth steel, feeling the untapped glories that might have lain ahead for what grew within, but knowing that they would never come to pass.
Personally, I think its quite an insight. Each of the primarchs grew to achieve glory on each of the worlds they were found, yet this quote would suggest that the thing in the canister didn't survive.

Anyone else got any thoughts on this?