Vinegar Sandwich sounds good, especially if the bread already has turkey, lettuce, tomato, and pickles. But hey, there's already pizza bread, so why not a Vinegar sandwich. Besides, bread with vinegar already in the mix would taste interesting by itself.
As for how Egoraptor got his name, that's his story but it's not necessarily true. You would have to ask the person who gave the name to him to get the true story. To me, it sounds more metaphorical like Egoraptor would do anything for his ego, possibly too much for it (possibly saying to Arin Hanson to be careful how you approach using your ego because you may get in trouble for it and/or if you don't want to hold back your ego, at least get caution, empathy, and wisdom to back it up).
For Nintendo, as to why the company hasn't made dream games like the Mario Kart you guys were talking about earlier, it may be too much work for them to do. To emphasize, Nintendo would have to re-resolute the graphics of the previous maps in the Mario Kart series and expand the maps to add new interest to them. Why do they have to do this? Because they want to get on the good side of critics, fans, and gamers alike.