The crucial moment is getting closer and Feyenoord will soon be suggested, which option might work best for the club. With deadline for recommendation near major, players step in, presenting their concept of how a 65,000-capacity De Kuip might look.

As we informed you just over a month ago, Feyenoord commissioned a trio of experts to examine all available options and recommend the most viable one for the club. The goal is to get a 60,000+ stadium and make it happen within the next few years.

No wonder BAM Sports, company known for not expensive, but well-thought stadiums business-wise decided to step in. Their concept for De Kuip's extensive redevelopment was presented in AD.nl today. It foresees the old and new De Kuip blending with each other.

The 76-year-old structure of existing stands would remain untouched, which should satisfy traditional fans. On the other hand a completely independent third tier structure would be added to allow the stadium reach 65,000.

The important difference from other visions submitted so far is the roof. Here the cover would be a tensile-membrane structure. Very lightweight and simple, it would see four giant srceens hanging at the heart of the pitch. There would also be a possibility to add a retractable roof system to it, leaving less room for weather dependency.

Along with capacity increase the stadium would also get a solid expansion of its corporate hospitality offer. 90 skyboxes would be available for clients along with much richer infrastructure under the stands.

All this is priced by BAM at just €185 million, only slightly above half the price of a new stadium. It's a major advantage, because the plan to relocate has been stuck so far precisely with financial guarantee problem. This is why AD.nl suggests the three experts are very happy with BAM Sports bid. Reportedly, so are the municipal authorities.

However, BAM aren't the only ones eyeing this huge contract. The project worked on by Volker Wessels may have been stalled by lack of financial guarantees so far, but should the climate among city council members change, it may be back on the table. A new stadium at Varkenoord (across the street from De Kuip) is said to cost some €340 million.

Third option after BAM and Volker Wessels is the Red De Kuip proposal. RDK is a social campaign, established as an alternative to leaving De Kuip. The stadium would receive a new third tier and new external cladding.

The major difference with BAM Sports is the roof. RDK would prefer to retain the existing structure, which would only be slighly extended to properly protect everyone inside the stadium. Pricing is similar with BAM (€141 million), while capacity stands at 63,000.

Fourth proposition came recently from Amsterdam-based Zwarts en Jansma architects. The office known for stadium designs in the Netherlands suggests increasing capacity in a unique way. According to ZeJ it's possible to break 60,000 without adding another tier atop the current stadium. Instead, the office suggests lowering the pitch and building a proper lowest ring in the place of current temporary tubular stands.

A distinctive feature of this proposal would be the roof seen above. However, architects indicate it's only an option of how to solve the issue of proper weather protection in their vision.

Last idea on the table is one we are yet to see on renderings. A concept by Prof. Hennes de Ridder foresees the smallest changes to the stadium itself for the very lowest budget of €60 million. The stadium might grow to 55,000 within one season.

The plan wouldn't alter the historical stands or roof, all changes would come near ground level. Pitch would be lowered and a new sunken tier of seating with a ring of skyboxes would be created, along with additional commercial facilities around the stadium.