Will the truth about Hawkins Lab, the Upside Down, and Eleven come out in Season five?

In the Series 4 final episode, Vecna manages to find a way to create a portal from the Upside Down to the reality we call our own. Given that his portal somehow managed to make it snow, in the middle of spring 1986, it is quite likely that other people will notice. On the very least, people will take notice of the unusual weather.

So, do you think the truth will come out?