2nd/11th leagion's

So the creators of Warhammer have this weird fixation on making it so if you make up your own sub faction in the lore, they leave things ambiguous so it technically could be canon. So what if you make your own Space Marines that have their own Primarch? Well there are 2 Primarchs that are missing so your made up legion could be canon. Yeah I really don't like this. I hope they retcon this and make these leagion's interesting.

There is at least a little bit of lore about them so I'll talk about it.

1. Malcador's chair has skulls on the arm rests. These skulls have the Roman numerals for 2 and 11 on them. So these Primarchs are dead.

2. Horus tried to talk about them during a meeting with the other Primarchs. Malcador got so angry with Horus he blasted him with Warp lightning. So we know Malcador really doesn't like them.

3. The other Primarchs are scared of Leman Russ and the Space Wolves. I think I heard someone metion he's killed Space Marine Legion's before but that might be me missrembering or it's the Magnus thing and I'm being confused. So maybe Leman killed them? I'm not so confident about this 1.

So Erda loves her son's. She wouldn't want them wiped out. So would these 2 Primarchs still be around in this universe? Well there's not enough information to say. Since I don't want the extra work, I'll say they did something so bad even Erda couldn't forgive them.