This or something similar seems to be the most likely considering the circumstances:
1) He would never admit to doping during his Disco tenure (otherwise Bruyneel wouldn't be there). Whatever he'll admit, he'll claim that he was clean at Disco.
2) He'll admit something fishy (he's reading a prepared statement, probably written by lawyers, and doesn't allow for questions)
3) The question is, will he admit to outright doping under Saiz or will he only admit to 'having met Fuentes and discussed training plans'?
So, here's a different question. Assume he admits the use of PEDs under Saiz (unlikely that is), what would the ASO/UCI do regarding his TdF win? As a doper he should've been banned for 2 years, hence he should've never been allowed to start the 2007 TdF. On the other hand, he finished it in first place and neither did he fail any tests, nor did he miss pre-tour tests (as far as we know), nor does he admit doping in 2007. So, what are they going to do about it?