Heated Rivalry headcanons:
Shane is a huge Marvel nerd, which is why he went to Le Tambour when he heard that the X Squad cast was there
Svetlana put Ilya in heavy eyeliner and a mesh shirt for a club night at least once and everyone was all over him
Shane chose a macrobiotic diet because it originated in Japan and is all about balance
Ilya gets tattoos for each of their children
Shane considered going to McGill if he didn't get drafted by the MLH and might still apply after he retires
Ilya considered trying Formula 1 racing after he retires from the MLH
Ilya started reading Anne of Green Gables after sitting next to Ryan Price on that flight but Lucy Maud's descriptions of nature got on his nerves so he gave up and watched the movie instead (the 1985 one with Megan Follows, at Ryan Price's recommendation). He cried multiple times.
David, Yuna, Shane, Ilya and their children all go to Wimbledon at least once
Alexei's daughter makes contact once she turns 18 and eventually comes to visit
Ilya and Svetlana have had at least one threesome. Maybe multiple, so they could have a threesome with a guy and one with a girl.
Shane ordered his dildo after his first hookup with Ilya, and it's a very boring black
Ilya is lowkey obsessed with marine life documentaries, like about whales and octopodes
After retiring from the MLH, Shane sets goals like "run a marathon" and "get a black belt"
As a dad, Ilya gets really into making different kinds of soup and perfecting his signature soup recipe
Ilya, Svetlana, Rose, and Miles go clubbing together every now and then. Shane is designated driver. Afterwards, they have a slumber party at Shane and Ilya's house and they all eat junk food and watch Legally Blonde and sleep on the floor in the living room then they all cook a huge breakfast together the next morning
At least one of Hayden's children goes to Shane and Ilya's hockey camp (maybe Ruby, cause "she's a beast") and develops a very close bond with Ilya built on a solid foundation of chirping each other tirelessly
Rose and Svetlana become the Empty Netters of the Heated Rivalry universe (talking hockey and pop culture) and they have Yuna as a guest
Miles becomes friends with Scott and Kip and ends up producing a biopic about Scott
Kip and Miles have a support group for how all these gay hockey players are so ignorant about gay culture and history
Ilya has VERY strong opinions about RuPaul's Drag Race
Svetlana and Rose are dubbed honorary WAGs for the purposes of group chats, parties and girls trips
Ilya and Hayden eventually bond over one thing: Shane is actually an asshole ("geez, Hayd, you wanna get me pregnant, too?"/"I wasn't clear. I'm sorry in advance for tonight. We're gonna destroy you guys.")
Yuna, Jacki and Ilya do brunch sometimes
Okay, that's all I have for now! I'm sure I'll have more in the future!