Thanos gets his hands on all seven chaos emeralds of the sonic series

[Epicazeroth]

The Watcher's scenario sounds most realistic.
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Movie Thanos could give them to that Chitauri lead guy and see if that beats the Avengers.

[WaltRunsThingsSon]

Thanos will just wind up losing them because of his subconscious desire to be a failure, as usual.

[Chou Blaster]

Thanos: Hmmm, more bling! :They glow.:

"I do not get it, their supposed to do something?"

:Fart, laughes it off and tosses them away.:

[Kirika]

Thanos: Hmmm, more bling! :They glow.:

"I do not get it, their supposed to do something?"

:Fart, laughes it off and tosses them away.:

Being sonic by having him explain to Thanos what they're supposed to do and how to use them.