I've got a theory that I'd like to share and hopefully get some good feedback as to whether this would be a good idea or not.
Let's say may website, www.example.com, consisted of a page www.example.com/something/. I plan to create new content for my website that may take several months to develop/create. So my theory is that if I create the URL now called, www.example.com/something-else/ and include a 302 temporary redirect to the most relevant page, in this case www.example.com/something/. I would then include the new URL into the Google Webmaster Tools sitemap so that it is accessible by the Googlebot. As a 302 redirect will crawl the URL and not pass any PR or bad equity to the redirected page (www.example.com/something/) meanwhile indexing that URL in Google.
As my actual page won't be ready for a couple/few months it would give the URL www.example.com/something-else/ time to gain some sort of trust and recognition in Google. So once it eventually does go live, it would take less time to start ranking for a competitive keyword.
As I've mention, this is a theory and may raise a number of issues. Would this be something worth testing and potentially risking my site or would it be a straight 'NO DON'T DO IT!'
I appreciate anyones help as I am still pretty new to the SEO world!