Viewers can't say they weren't warned in advance. At the end of 2018's CW Arrowverse "Elseworlds" crossover that brought together The Flash, Arrow, and Supergirl (and almost DC's Legends of Tomorrow, but they let it go to machine), we saw that the end was only the beginning… of the end. As Barry (Grant Gustin) and Oliver (Stephen Amell) shared what felt like a final toast and Kate Kane's Batwoman (Ruby Rose) returned to protecting the streets of Gotham – with a sense that something felt a little off – we got a small taste of what's still to come in 2019:
"Crisis on Infinite Earths"
Worlds will live! Worlds will die!
And the CW's "Arrowverse" will never be the same…
With a "Crisis" on its way, it's only fitting that we hear from LaMonica Garrett – who took to Twitter after the crossover news was announced to remind everyone there's a certain someone out there in the multiverse still "monitoring" things:
— LaMonica Garrett (@lamonicagarrett) May 16, 2019
At CW's 2019 May Upfronts presentation on Thursday, the network offered a few "'Crisis' management" clues for info-starved fans. This year's "Crisis on Infinite Earths" crossover will include Arrow, The Flash, Supergirl, DC's Legends of Tomorrow, and Batwoman; the entire story will be five hours long; and the event will air over two quarters (3 episodes in December 2019, 2 episodes January 2020). There were initial concerns that DC's Legends of Tomorrow would not be involved – as the series won't be returning until midseason – but it would appear those matters have been resolved.
Curiously enough, Black Lightning is not listed as participating in the crossover event – surprising considering the "infinte earths" aspect lends itself to "guest appearances" from a number of televised DC properties (past and present) that aren't directly connected to the CW's "Arrowverse."
For most of their seasons, things have been "All Quiet on the 'Crisis' Front" when it came to Arrow, The Flash, and Supergirl – but that changed in a major way during this week's season finales of Arrow and The Flash. In Arrow season finale "You Have Saved This City," the Monitor (LaMonica Garrett) returns to cash in on the favor that Oliver owes him: help him save the multiverse – taking a moment to tell him the "fine print": Oliver's going to die during "Crisis" and there's nothing the Monitor can do to stop it.
Then there's that matter of Future Felicity (Emily Bett Rickards) and the trip she's taking with the Monitor to see Oliver… somewhere… and it's apparently a place she can't come back from. Hmmm…
Meanwhile over at The Flash season finale "Legacy," some recent maneuverings with Time has moved up the date on the Barry's "red skies/2024" newspaper warning just a wee bit… to say, 2019?