MU has a "buy" rating and a positive earnings surprise prediction from Zack's, and buying any semiconductor stock at such an attractive P/E is never a bad bet. (MU's P/E is about 6, vs. the average of about 15.) However, MU is also getting some massive bearish options activity, and in my experience these big options traders usually know what they're doing.
Options traders may be betting that even if MU earnings beat analysts' lowered expectations, the headlines will focus on the year-over-year and quarter-over-quarter declines. More importantly, these options traders may be betting that Micron will make a statement revising downward its full-year earnings guidance. Guidance almost always matters more than earnings surprises.