That's what I meant. The Germans were already looking at ways of going around the ToV. For example, they were working with the USSR and training the German Army in the USSR in the 1920's. I think that there would eventually be a conflict over the Danzig corridor.
Probably, yes. All German parties, even the moderate ones, were thouroughly against Versailles and, particularly, the border changes. While they could write off the Danish expansion (it was largely irrelevant and not particularly important) and, in a pinch, Alsace-Lorraine, the Eastern borders were generally unaccaptable to the Germans.
So, yes, there would have been a conflict with the Poles, but would this spiral into a large war or would it remain limited to a German-Polish fracas? That's more questionable, IMO. The Little Entente was falling apart and a resurgent (but rational) Germany might be able to politically isolate Poland ... there was some sympathy for the German cause OTL (wasted by Hitler for the most part), at least from Britain and France wasn't going to go to war without Britain to back them up.
Of course, it could spiral out into a larger war, as well. Probably with a Berlin-Moscow axis on one side (the Germans were pretty buddy with the Soviets well before the Nazis).