Extra combats and vehicles work well together considering some of the best vehicles have attack triggers, including Smuggler's Copter, Skysovereign, Consul Flagship, and Lumbering Worldwagon
Removal has also gotten better, and Sphinx rarely stays around
You can also push for some on-theme elemental synergies with the likes of Risen Reef and Ashaya, Soul of the Wild and Phylath, World Sculptor
Even if youre not getting back three haymakers youre still able to get three creatures for six mana total, on an effect that cant really be interacted with with single target graveyard removal they need to nuke your graveyard before the spell resolves
I would imagine Sarkhan's Unsealing would need to be renamed, since it explicitly references a Magic: The Gathering character, and the Eldrazi Kindred Instant Not of This World may not be a good thematic fit, but a Fight Rigging card themed after the Wall Market fighting arena would make total sense
This adventure was just getting started