DENVER — Brock Nelson admits that, in many ways, he’s still processing not being an Islander.

A big part of that process will come on Sunday night when he faces his former team for the first time as the Islanders continue a seven-game road trip that has started 4-0-0 against the Avalanche at Ball Arena. A bigger, likely more cathartic moment will come when the Avalanche visit UBS Arena on Dec. 4.

“I’m excited to see the guys,” Nelson said after the NHL-leading Avalanche (12-1-5), who have won five straight and are 6-0-2 at home, skated on Saturday at their suburban practice facility. “There’s a lot of guys I haven’t seen since the trade happened. So it will be nice to hang out [Saturday].

Nelson, dealt to the Avalanche on March 6 after former president/general manager Lou Lamoriello c

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