I think that someone in Russia has powers like el cuz how would they know about the upside down? This child of adult that was experimented on went into the upside down a few years ago and saw el and told the Russians and ever since they have been using those keys to go into the upside down. That’s why they were in Hawkins Bc they knew that this girl was from America and they want to have control in other places. Now for season 4 i have a theory. The American is hopper but papa came to Russia looking for that adult or kid maybe to use her as a weapon but realized that the Russians are using her and they team up and use this person to trap el. They find out el doesn’t have powers anymore and they are thinking maybe like they could experiment on her again. They use hopper as bait to get her to Russia. Or I think that this person that has powers too is watching el and tells the Russians that she was close with the American and they use hopper as bait to get her there basically the same thing just a little different.

some way to be better than the Americans

My theory is they want to capture as many demogorgons they can and as many prisioneira they can so they feed the beast and it gets bigger and at the end they can use it for wars ( like a huge weapon )

Maybe we all know how america and russia are HUGE rivals or enemies but maybe they caught word of what was going on and What was happening but the source was trapped through this gate through And they thought it would be a huge and powerful wepon to be used if they were to go to war with america and it would make it an easy win for them

This might be a huge stretch but

Maybe we all know how america and russia are HUGE rivals or enemies but maybe they caught word of what was going on and What was happening but the source was trapped through this gate through And they thought it would be a huge and powerful wepon to be used if they were to go to war with america and it would make it an easy win for them

This might be a huge stretch but

Maybe we all know how america and russia are HUGE rivals or enemies but maybe they caught word of what was going on and What was happening but the source was trapped through this gate through And they thought it would be a huge and powerful wepon to be used if they were to go to war with america and it would make it an easy win for them

This might be a huge stretch but

The Russians want to invade from US soil, and might be able to draw power or use demogorgons from the upside down

Their using the upside down to power some kind of weapon or they'll use the mindflayler/Demargorgan as a weapon

I just thought some how the russians came across the upside down and wanted to learn more about it and then use its creatures as weapons. They came to hawkins, did experiments, captured some shit (the cage erica saw), then brought it back to russia. We do know that they have been in hawkins for at least 2 years. But we dont know how long exactly. We really know nothing about them or what they've done.

Oooo maybe when the hawkins lab closed the ppl there wanted revenge. And i mean giving information to the enemy would be a great way to get that revenge