An "intriguing idea" is a concept or thought that is interesting, captivating, or fascinating. It captures your attention and sparks curiosity. Full definition
But in fact, I came up with a good handful of intriguing ideas. (fool.com)
I'm beginning to come up with some very intriguing ideas for the distribution and sale of indie comics, prose novels, and art books. (johnnysaturn.com)
One of the most intriguing ideas is to sift through masses of social media data for subtle patterns or indicators. (aaas.org)