The Arrowverse has been going strong and expanding its worlds for most of the decade now, but it can't last forever.

The CW has already confirmed that the show that kicked the whole thing off, Arrow, will be coming to an end with its eighth season, and that got us wondering about whether any of the other superhero shows will be wrapping up anytime soon.

So, while at San Diego Comic-Con 2019, we asked Grant Gustin about The Flash coming to an end, and he revealed that he's considered the possibility that it could end soon.

The CW

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"I mean, we're all contracted right now [for] seven seasons – this is the sixth, so it's definitely in the back of my mind that next year, even, could be potentially the last season. Who knows?" Grant told Digital Spy and other press.

"We've all been saying that here today, trying to really take in Comic-Con while we're here, for the sixth time. It can be overwhelming – especially for me, personally, I get a little anxious about it.

"But I'm taking that little bit more time to really take it in, because our show could also end in the near future."

The actor also teased a little bit about season five's 'Crisis on Infinite Earths' finale and how it will affect the show going forward, saying: "It trips us up obviously, pretty bad.

Warner Bros / Jack Rowand Sky

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"Iris and Barry are the only ones that know for a while – we don't know how to tell the team.

"Iris is pretty resolute, strong-willed about it, Barry is a little shaken up when we come back, because it's right on the heels of losing Nora and neither of them are really dealing with that in the best way."

The upcoming sixth season will also feature a familiar face from Heroes as the new baddie, and you can get a taste of the show's latest villain in the trailer below:

The Flash airs on The CW in the US. Sky One and NOW TV air the show in the UK. For all the news you need from Comic-Con, you can go right here.

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