As usual, your suggestion is valid. Apart from the definitions you linked to, I also found in the Oxford Dictionary:
intel
→ noun
[mass noun] [often as modifier] (Military, informal) military intelligence; information.
- ORIGIN 1980s: abbreviation.
The Oxford Dictionary of English (revised edition). Ed. Catherine Soanes and Angus Stevenson.
Oxford University Press, 2005. Oxford Reference Online (http://www.oxfordreference.com/views/ENTRY.html?subview=Main&entry=t140.e38791)
I'll add "intel" next time I update the word list.