Warning: This story contains major spoilers fromThe Flash-Arrowcrossover.
Read at your own risk!
The big twist from this years epicThe Flash-Arrowcrossover?

Credit: Katie Yu/The CW
(More on that below.)
Consideringeveryonedied, how big will the consequences be this time around?
Youre going to have to watch upcoming episodes ofArrow, executive producer Marc Guggenheim teases.Ruh-roh.
It probably doesnt help either that well be seeing more of Samantha in coming episodes.
Its definitely going to come to a head in the middle of the season, EP Wendy Mericle says.
True to form, were really going to mine that.
There will be some fallout for both of them.
As of right now, its saved forLegends, EP Greg Berlanti says.
Well also find out inLegendsthat Vandals plans dontjustinclude killing the Hawks in every lifetime.
He has a very clear plan and trajectory, Guggenheim says.
The thing about Vandal is that for him a lifetime is an eye blink.
He thinks in thousand-year-old terms.
Hes very much the master of the long con.
Youll have to watchLegendsto find out.
The other thing that starts to happen… is his relationship with this new Wells [Tom Cavanagh]… Theres a two-part episode, [episodes] 13 and 14 this year, Berlanti adds.
Cisco isnt the only member of S.T.A.R.
Labs dealing with lady issues.
Can he actually have a relationship with somebody and what does having a relationship with somebody mean?
You caused a lot of unnecessary hurt and you caused people to be in danger.
You have to do things differently if you really care about this girl.'
Barry is really wrestling with those two things moving forward.
Just like with Iris last year, [Patty] doesnt need any help getting herself into trouble.
Patty loves the metahumans, she loves the danger and she loves the science of it all.
You guys will have to see how it plays out.
The Flashairs Tuesdays at 8 p.m. ET,Arrowairs Wednesdays at 8 p.m.
ET andDCs Legends of Tomorrowwill debut Thursday, Jan. 21 at 8 p.m.
ET on The CW.