Middleware to test something else than User

Hello,

Is it possible to use a middleware to test for example if the registrations are open for a game ?

if (! $game->registrationsAreOpen())
{
	return redirect()->...
}
return $next($request);

I have checked the documentation, but I do not understand how it could be possible to add a parameter like $game (which could be the game that is used at the moment in the code). It seems that the middleware can only use the $user variable to check something about the connected user.

Thanks for your answer.

Vincent