。
We'll be expecting you next week.
Literal
Next-week honorific-wait-humbly-doing.
お待ちしております is intensely polite: お + 待ち (masu-stem of 待つ) + する → humble; then + おる (humble いる) + ます for doubled politeness. The register is about as polite as spoken Japanese gets without shading into written bureaucratic forms. Used by shops, hotels, and for formal visitors.