And by high chance, I mean, relatively high chance. Like, maybe, about 1 in 1,000,000,000,000,000,000. Which, for this sort of thing, is rather high.
‘Oumuamua is a very large cigar shaped thing moving at just over 300,000 kilometers per hour. It came from outside our solar system, and will travel right through our solar system. It is near Jupiter now.
The thing is, this cigar shape is odd. Space rock should be blob shaped. This is elongated, and I think it is moving along its long axis. This is exactly how one would design a space craft to travel between solar systems, if you were into that sort of thing.
If you read any of the books in this series, you’ll see that in the future, when Earthlings decide to travel to other solar systems, this is how they will do it, using actual elongated asteroids to build their ships.
Possible scientists at the rich-person-ego-trip institute “Breakthrough Initiatives (we really do pay these rich people too much these days) are planning to make contact with the aliens. Here is a terrestrial press release outlining that project.