The pronoun "us" is almost exclusively used as a subject, whereas "we" acts as its object counterpart. The sentence "This is us" is grammatically correct as it follows the subject-verb-object construction. "This is we" is also an appropriate construction, but sounds old-fashioned.
This is us
Some examples from the web:
- This is us approaching the observation deck.
- This is us in Cornwall, and I met that boy.
- So, this is us, on the coast.
- Now this is us!
- This is us dressing down.
- This is us at my eldest child Grainne's Christening.
- This is us on the island of Bimini.
- This is us... on our wedding day.
- This is us at the base of their hill.
- This is us at the Khyber Pass, and that's our bus.
- This is us trying to make sure that we don't lose precious samples.
- (Zoe) This is us, at Haven, and here's Miranda.
- This is us invading a country right here.
- Often we run into obstacles. This is us coming back from
- So, this is us right now.
- Listen... this is us doing our job.
- So this is us landing on the Ross Ice Shelf in Antarctica.
- You see? this is us, and we're traveling around the sun.
- If this is us and that's them,
- This is us now.
This are us
Some examples from the Internet:
- It doesn't look like this expression is very popular! The search could not find any examples on the internet.