As it says in the title, can the East Germanic tribes like the Goths, Vandals, Burgundians and Gepids stay in the area around the Vistula, nowdays Poland, instead of migrating?
And if you think they can, what effects do you think this may have(assuming they don't go invading the Roman world)?
May they fill the vaccum left by the West Germanics, and move to their lands? Or will they just stay there and consolidate their culture and power? And how may this affect the future Balto-Slavic migration?
What do you think either of these may cause in the future development of both the region and neighbor zones?
And just for a last one, do you believe the Germanic religion has a better chance of surviving with a possibly bigger population of followers?