Sweetums would be nice, but you might want to consider keeping it simple with a less is more philosophy. Key minifigures are nice. Too many of them and it takes away from the set itself and they are trying to get people to avoid army builder type sets. The more you add to this the higher pricepoint it will come in at too .....what is the most expensive et they have done through this so far? I know Ghostbusters came in at $50, but most have been at the $35-$40 range. Not sure if they will approve sets that are too expensive or not though. That being said I'll still support anything you put forward. (I hope I'm not coming off as telling you how to do this....just offering my humble opinions....I really am looking forward to what you create).