Anyone have anyhting for this?
I'll toss my own two cents in just to get it kickstarted:
In 120 BC, the Teutons move east instead of South, eventually settling on plains of the Memel River. In 75 BC, the Suebi and many more Germans begin moving west. In a fit of luck, when the Helvetii departed their homeland, many germans flooded into the area. When Caesar force them to return, they found their territory occupied. German victories in the region are shortlived, and they are pushed back across the Rhine. Though the Roman Phyrric Victory here will play into this world later.
In 58 BC, Caesar is given false information. The Suebi, instead of moving for Vesontio, instead are travelling to the North, taking on the Lingones. The Romans abandoned Vesontio to attack the Germans there, but are ambushed in the Vosges. Vesontio falls a year later and the Celts are forced to the western banks of the Moselle. German expeditions travel across the Meuse Capture and into eastern Belgica.
It isn't until 55 BC when the Celts are again threatened by the Germans and the Romans are able to defeat the Germans. The defeat is not as bad as the OTL Battle of Vesontio, and the Germans are in a better position on the whole. Forcing Caesar and the Romans to accept the border in red.