You'll find out in my next post if he's Erik or not. But that question is left up in the air. Honestly, I truly think this is Doom given some of the things he accomplishes during this series and the dialogue from the next issue.
However during the second to last issue when present aka 616 Doom and Namor capture him, they unmask this Doom. 616 Doom remarks on how Doom 2099 doesn't share the same face as he. However, Doom 2099 counters with the body hoping techinque, stating how else do you think he survived for this long? As always, you don't get a real glimpse of Doom 2099's face. Just that it's in shadow when he's unmasked. Though given my next part it does make sense.
However, some people have thought that Doom 2099 could be Kristoff. But again, you'll get your answer next part when I post #25. It's a nice thunderous passing of the torch between Francis Moore and Ellis.