The release of the chairman's statement hit Emap's shares hard, sending its price down 13.26% to 726p in early trading.
At today's AGM, Broadbent will tell investors in the consumer and business-to-business magazine and radio group that current trading is worse than expected, with advertising weakening in consumer magazines and radio.
"Trading in the first two months of the financial year [April and May] was in line with our expectations, but the trends that are now emerging make us more cautious about the prospects for underlying revenue, which may be marginally down in the first half," he will say.
Magazine circulation performance will be marred by increasing declines in its men's and car titles, which include FHM and Zoo, but steady overall thanks to the growth of weekly titles.
Emap believes its difficulties are linked not just to the current ad market but to "technology-driven structural changes". For example, its public-sector recruitment ad revenues have dropped, possibly due to factors such as free website Nhsjobs.
Broadbent will tell investors that the company will increase investment in new product development in its continuing businesses to £25m, including funding more digital innovation.
The company is set to make acquisitions primarily in the business-to-business sector. It said it was particularly pleased with the performance of Worth Global Style Network, the fashion information website it paid £140m for last October.
Emap remains committed to handing £285m back to shareholders from the proceeds of the forthcoming €550m (£381m) sale of its French offshoot to Italy's Arnoldo Mondadori Editore. It expects the deal to complete before October.
However, Broadbent will also allude to the possibility of cost cuts, saying, "As trading conditions are likely to remain difficult, we will manage our operating cost base accordingly."
Broadbent will hand the chairmanship of Emap over to deputy chairman Alun Cathcart at the end of the meeting.
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