If you loved Guardians of the Galaxy Vol. 2, try Captain America: The Winter Soldier
A bridge between a film you've already seen and one most people haven't. Here's what they share, and what the second one does that the first one doesn't.
You already loved

Guardians of the Galaxy Vol. 2
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Captain America: The Winter Soldier
What they share
Theysit in Action / Adventure / Science Fiction territory. If that's the register that drew you to Guardians of the Galaxy Vol. 2, the second film will land in a comparable space — through a different lens.
What Captain America: The Winter Soldier is
Washington D.C., modern skyscrapers, a nostalgic vinyl record. A S.H.I.E.L.D. colleague under attack, Steve Rogers in the midst of a conspiracy, with the Black Widow and the Falcon. This Marvel sequel expertly balances action and intrigue.