There's not a lot to force Dennis out into the Atlantic in the next few days -- it'd be a close call as to whether or not it gets out into the Atlantic in enough time (and in a strong enough state) to affect the future course of Emily at all. And, if they ran into each other...it'd likely be above the subtropical ridge, with some likely interaction between the two, peraps Emily absorbing Dennis' remnants or Emily becoming absorbed by Dennis' remnants and becomnig extratropical. Not likely, and well down the road, but still a possibility.