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RICK & MORTY VS. CTHULHU 4-issue miniseries (Oni, 2022)
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PUNCHLINE SPECIAL #1 (Antarctic Press, 2023)
features a crossover with Camilo Wallace
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IMPOSSIBLE TEAM-UP: IMPOSSIBLE JONES & CAPTAIN LIGHTNING #1 (Scout, May 2023) is billed as a crossover between the titular characters created by Karl Kesel and Tom Grummett respectively, although I can’t find any mention of Captain Lightning outside of this issue.
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The following articles describe links between Spawn and the Massive/Radiant Black universe, as well as between Spawn and Local Man.
https://www.cbr.com/spawn-haunt-powers-heaven-hell-image/
https://www.cbr.com/local-hero-spawn-malebolgia-defeat-image/
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TEENAGE MUTANT NINJA TURTLES VS. STREET FIGHTER 5-issue miniseries (IDW, 2023)